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Which of the following species will have...

Which of the following species will have the largest and the smallest size ?
`Mg, Mg^(2+), Al " and " Al^(3+)`

A

`Mg^(+2),Mg`

B

`Al^(+3),Mg`

C

`Mg^(+2),Al`

D

`Al^(+3),Al`

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The correct Answer is:
B
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